Import official C23 code examples for Modern C (Jens Gustedt, 2024)HEADupstream-importmain

- Add official C source files, Makefile, c23-fallback.h, and LICENSE
- Update README.md with study mirror notice

1 files changed, 12 insertions, 0 deletions

diff --git a/esc.c b/esc.c
new file mode 100644
index 0000000..717e556
--- /dev/null
+++ b/esc.c
@@ -0,0 +1,12 @@
+#include "esc.h"
+
+void esc_move(FILE* f, int vert, int hori) {
+  if (vert > 0) fprintf(f, ESC_CSI "%dB", vert);
+  else if (vert < 0) fprintf(f, ESC_CSI "%dA", -vert);
+  if (hori > 0) fprintf(f, ESC_CSI "%dC", hori);
+  else if (hori < 0) fprintf(f, ESC_CSI "%dD", -hori);
+}
+
+void esc_goto(FILE* f, unsigned vert, unsigned hori) {
+  fprintf(f, ESC_CSI "%u;%uH", vert, hori);
+}